JP2014062396A - Hinge mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge mechanism appropriate for a flip-up counter to be installed in a convenience store, a dining kitchen for business use and a snack bar, and capable of being attached to a relatively large-sized type.SOLUTION: A hinge mechanism includes a first hinge part that is attached to a movable body, a second hinge part that is attached to a fixed body and that assumes a shape symmetrical to that of the first hinge part, and a link bracket that is swingably connected to each of the first and second hinge parts. Parallel pivots pass through barrels of the hinge parts and a sleeve through-hole of the bracket to achieve whole integration, respectively.

Description

  The present invention relates to a hinge mechanism suitable for a flip-up counter installed in a convenience store, a commercial dining kitchen, or a snack bar, and can be attached to a relatively large one.

  In a convenience store or a commercial dining kitchen, as disclosed in Japanese Patent Application Laid-Open No. 2005-211125, a long counter including a cash register counter is installed, and a part of the counter is provided so that people can enter and exit the counter. A flip-up counter is provided. In this flip-up counter, one edge of the movable top plate is pivotally connected to a fixed top plate via a hinge, and when the counter passes, the movable top plate is flipped up and rotated until it turns 180 degrees. While installing this flip-up counter, a swing door may be attached below the movable top plate as desired.

  When a normal hinge is attached for turning the flip-up counter, the shaft portion of the hinge protrudes from the plane of the movable top plate in a normal state where the movable top plate is closed. The protruding hinge shaft portion is not preferable because it is caught when a product to be transported is placed on the movable top plate or is caught when the counter top plate is wiped and cleaned. In addition, since a plurality of normal hinges are distributed and attached at several places in the depth of the top plate, a gap is generated between the hinges when the movable top plate is closed, and the appearance as a product is deteriorated.

  If the flip-up counter does not always have a movable top plate at the time of flip-up opening and closing, the movable top plate falls to the horizontal position by its own weight from the middle of rotation, and a large impact and noise are generated. For this reason, Japanese Patent Application Laid-Open No. 2007-315013 regulates the free fall of the top board by its own weight by using a torque hinge having a predetermined rotation resistance. As a result, when the movable top plate is released at any opening position, it stops at that position and does not fall freely to the horizontal position. The movable top plate may be rotated downward from the open state by hand and closed so as to be pressed by the hand when approaching the horizontal position. This hinge mechanism is such that the hinge is positioned below the top plate surface and there is no gap between the movable top plate and the fixed top plate, and the movable top plate falls by its own weight and generates impact and noise. There is nothing.

JP 2005-211125 A JP 2007-315013 A

  The hinge mechanism disclosed in Japanese Patent Application Laid-Open No. 2007-315013 is beautiful because the hinge is housed below the top plate surface and the movable top plate and the fixed top plate are flat and close to each other. The angle is limited to 95 to 100 degrees, and the movable top plate is standing even at the maximum opening. The flip-up counter not only passes by hand, but often at convenience stores, it often passes with delivery luggage and in-store goods, so it is said that the open movable top plate is standing Luggage is caught on the movable top, and accidents that damage or drop the luggage tend to occur.

  The present applicant has already proposed Japanese Patent Application No. 2011-160604 as a hinge for a flip-up counter, and the present invention corresponds to a higher-grade advanced product. Although the hinge mechanism of the present invention is substantially the same as the hinge mechanism disclosed in Japanese Patent Application No. 2011-160604 in that it requires cutting on the counter side of the mounted side, the hinge mechanism is relatively installed. It is easy and the load resistance is even better.

  The present invention has been proposed in order to improve the above-mentioned problems relating to the conventional flip-up counter hinge and the like, and even when attached to a relatively large flip-up counter, the movable top plate is fully opened. To provide a hinge mechanism that can be rotated until it becomes 180 degrees horizontal, and that the movable top plate can be easily lifted in any direction of opening and closing and that partially brakes from a half-open position to a horizontal position to prevent free fall. It is aimed. Another object of the present invention is to provide a hinge mechanism capable of reliably stopping the movable top plate in the half-opened state of about 90 degrees and in the fully opened position of about 180 degrees.

  The hinge mechanism according to the present invention is pivotable with a first hinge part attached to the movable main body, a second hinge part attached to the fixed main body and symmetrical to the first hinge part, and the first and second hinge parts. Link brackets are connected to each other, and parallel pivots respectively penetrate the barrel portion of the hinge portion and the sleeve through-hole of the bracket to integrate the whole. In the hinge mechanism of the present invention, the one-way wheels are stationaryly accommodated in both barrels of the link portion, and the pivots are supported so as to be rotatable in one direction via the one-way wheels, while the plastic brake cylinder is placed in the sleeve through-hole of the bracket. The body is stored stationary, and each pivot is press-fitted through the brake cylinder so as to be supported for braking rotation. In the hinge mechanism of the present invention, by attaching the first hinge part to the movable main body and attaching the second hinge part to the fixed main body, when the movable main body is turned from the fully closed state, one of the hinge parts freely rotates, When half open, the first link portion is stationary by one side of the link bracket, and when the movable body continues to turn, the second link portion performs braking rotation until full opening.

  In the hinge mechanism according to the present invention, the first and second hinge portions are preferably formed with rearward projecting portions arranged horizontally, and the surface of the rear projecting portion is located on the side of the link bracket in the half-open or fully-open position. Abuts the side. Further, the link bracket has a laterally long side shape, and it is preferable that the plastic brake cylinder or the one-way wheel is stationaryly stored in the through holes of the sleeves formed close to both sides of the bracket. The left side of the bracket is in contact with the surface of the rear protrusion of the first hinge part, or the right side of the bracket is in contact with the surface of the rear protrusion of the second hinge part.

  In the hinge mechanism according to the present invention, the plastic braking cylinder is formed of a cylindrical body that is accommodated in the sleeve through-hole of the link bracket or in the barrels of the first and second hinge portions, and the axial protrusion in the cylindrical body. By interposing, it stops in the through hole and effectively brakes the press-fitted pivot. The one-way wheel is stored stationary in the barrels of the first and second hinge portions or in the sleeve through-holes of the link bracket, and the load resistance of the hinge mechanism can be adjusted by increasing or decreasing the number of storage in the barrel. In the space created by reducing the number of rings stored, a plastic wheel having the same shape as the one-way wheel is arranged. Two hinge mechanisms are attached to the left and right edges of the top plate of the flip-up counter, respectively, and chamfered so that the movable top plate can turn close to the fixed top plate above the adjacent sides of the movable and fixed top plate. preferable.

  The hinge mechanism according to the present invention can be attached to a larger counter as compared with the existing product because the load resistance can be set higher than that of the existing product. Since the hinge mechanism of the present invention has a relatively small number of parts and the load resistance can be adjusted, even if it is large, the cost difference with the existing product is small and can be immediately adapted to the use of the existing product. .

  When the hinge mechanism according to the present invention is attached to the flip-up counter, the movable top plate can be easily lifted up freely in any direction of opening and closing, but it brakes from the middle of rotation to the horizontal position. Thus, even if the hand is released from the movable top plate, it does not fall freely, and it is possible to prevent noise and finger-filling accidents due to the fall of the movable top plate. The hinge mechanism of the present invention has no portion protruding from the surface of the top plate when the movable top plate is closed, and can be completely opened by rotating the movable top plate until it is horizontal at 180 degrees open, so that delivery luggage and in-store products can be opened. They will not get caught on the movable top plate even if they pass with the

  When the hinge mechanism according to the present invention is attached to a flip-up counter, the movable top plate is stopped in the middle of rotation according to circumstances, and it is not necessary to use a useless force when passing the movable top plate. Even a simple woman can open and close easily. In the hinge mechanism of the present invention, when both side edges of the flip-up counter are cut and attached, both sleeves of the link bracket are stored below the top plate surface and cannot be seen from the front side, and the whole is flush with the counter. There is no loss of aesthetics. The hinge mechanism of the present invention can be attached not only to a flip-up counter installed in a convenience store, a commercial dining kitchen, or a snack bar, but also to various devices that can be opened and closed by 180 degrees.

It is a perspective view which shows the hinge mechanism which concerns on this invention. It is a top view which shows the hinge mechanism of FIG. 1, and has shown a part of 1st hinge part in the cross section. It is a fragmentary perspective view which shows the flip-up counter to which the hinge mechanism based on this invention is applied. It is the perspective view which looked at the 1st hinge part used with the hinge mechanism of FIG. 1 from back. It is a schematic side view which expands the one-way ring | wheel which carries out stationary accommodation in the barrel of a 1st and 2nd link part, and shows a part in cross section. It is a perspective view which shows the plastic ring which can be accommodated instead of a one-way ring. It is the perspective view which looked at the link bracket used with the hinge mechanism of FIG. 1 from back. It is a rear view of the link bracket shown in FIG. It is a perspective view which shows the plastic braking cylinder which carries out stationary accommodation in the through-hole of the sleeve of a link bracket. It is a side view of the hinge mechanism explaining the opening and closing process of the movable top plate with respect to the fixed top plate. It is a side view of the hinge mechanism which passes through the opening / closing process different from FIG.

  When two hinge mechanisms 1 (FIG. 1) according to the present invention are installed symmetrically on a flip-up counter 3 (FIG. 3) or the like, the movable main body corresponds to the movable top plate 5, and the fixed main body is the fixed top plate. It corresponds to 7. As shown in FIGS. 1 and 2, the hinge mechanism 1 includes two symmetrical hinge portions 10 and 12 and a link bracket 14, and parallel pivots 16 and 18 (FIG. 2) are respectively connected to the hinge portions 10 and 10, respectively. The whole is integrated by penetrating through the through holes 24 of the parallel sleeves 22 of the 12 barrels 20 and the link bracket 14 (FIGS. 7 and 8). The hinge portions 10 and 12 and the bracket 14 are made of, for example, polyamide FRP that can be appropriately colored, and the pivots 16 and 18 are made of stainless steel.

  In the hinge portions 10 and 12, the rectangular cylinder-shaped barrel 20 has an arcuate side surface above the adjacent side wall so that it does not come into contact with each other during mutual turning. The hinge portions 10, 12 usually have an L-shaped plane, are provided with a plurality of bolt holes 28 in a plate-like lateral extension 26 extending perpendicularly from the barrel 20, and the first hinge 10 is connected to the lateral extension 26. The second hinge 12 is horizontally bolted to the fixed top 7 via the lateral extension 26 (see FIG. 3). Further, at the opposite end edge of the counter 3, the first hinge portion 10 of another hinge mechanism is attached to the fixed top plate 7, and the second hinge portion 12 is attached to the movable top plate 5.

  On the other hand, the attached device such as the counter 3 needs to be cut at the left and right edges of the top plates 5 and 7 so that the hinge portions 10 and 12 of the hinge mechanism 1 can be correctly attached. For example, recesses 31 and 33 having a depth and a width in which the hinge portions 10 and 12 and the link bracket 14 are accurately fitted are formed on the surface of each edge of the top plates 5 and 7 (see FIG. 3). Further, the upper side 35 of the adjacent sides of the top plates 5 and 7 is chamfered so that the side surface has an arcuate shape so that the movable top plate 5 can turn in proximity to the fixed top plate 7.

  As shown in FIG. 4, rear projecting portions 30 arranged horizontally are formed below the rear portions of the hinge portions 10, 12. The surface of the rear protrusion 30 abuts on the side of the link bracket 14 in the half-open or full-open position (see FIGS. 10 and 11). The hinge portions 10 and 12 are generally perfectly symmetric as shown in FIGS. 1 and 2, but the barrel 20 or the lateral extension 26 may be formed in different shapes depending on the application.

  In the hinge portions 10 and 12, the inner peripheral wall 32 of each barrel 20 is narrowed on the inner wall side to form a through hole 34 having a small diameter and a narrow width (see FIGS. 2 and 4). The through hole 34 is slightly larger than the diameter of the pivots 16 and 18. Further, the diameter of the inner peripheral wall of the barrel 20 is larger than the diameter of the through hole 34. On the inner peripheral wall of the barrel 20, axial ridges 36 (FIG. 4) are formed at equal intervals in the circumferential direction, and the number of the ridges is six, for example.

  As shown schematically in FIG. 5, the one-way wheel 38 accommodated in the barrel 20 only needs to have a wide, short cylindrical shape, and its inner diameter is slightly larger than the diameter of the pivot 16, and its outer diameter is the barrel. It is approximately equal to 20 inside diameter. On the outer peripheral wall of the one-way wheel 38, axial grooves 40 are provided at equal intervals in the circumferential direction. When the one-way wheel is stored in the barrel 20, the grooves 40 are fitted with the protrusions 36 on the inner periphery of the barrel. As a result, the one-way wheel 38 is stopped in the barrel 20. Although the four one-way wheels 38 are accommodated for each barrel 20 in FIG. 2, the length of the one-way wheel 38 may be set to a length capable of accommodating 2, 3 or 5 or more barrels. If the hinge mechanism 1 does not require a large load capacity, the number of one-way wheels 38 may be reduced, and the plastic wheel 42 (FIG. 6) having substantially the same shape may be stored in place of the one-way wheel 38.

  The one-way wheel 38 is also referred to as a one-way clutch, and is a device in which the inner ring, that is, the pivot 16 can be rotated only in one direction by a plurality of small rollers 44 arranged around the one-way wheel 38. The one-way wheel 38 includes, for example, eight columnar small rollers 44 that contact the periphery of the pivot 16, and an outer ring 46 having a recess 48 with a relatively deep wedge-shaped cross section that accommodates each small roller 44. In the concave portion 48, a shallow groove portion and a deep groove portion are formed. In the one-way wheel 38, 5 to 12 small rollers 44 are usually arranged at equal intervals in the circumferential direction. In the one-way wheel 38, a part of the small roller 44 protrudes slightly inward from the inner peripheral surface of the cylindrical cage 50. In the one-way wheel 38, an elastic member such as a leaf spring 52 or a coil spring urges each small roller 44 toward the shallow groove portion side of the recess 48.

  When the pivot 16 rotates in the direction D of FIG. 5 or the outer ring 46, that is, the barrel 20 rotates in the direction C, each roller 44 moves in the direction of biting into the shallow groove while rotating clockwise in FIG. . When each roller 44 is pressed against the inner peripheral surface of the shallow groove portion and the outer peripheral surface of the pivot 16, it does not rotate and stops. At this time, torque is transmitted between the outer ring 46 and the pivot 16 via the roller 44, and the one-way wheel 38 enters a locked state that restricts relative rotation between the pivot 16 and the outer ring 46. On the other hand, when the pivot 16 rotates in the clockwise direction (counter D direction) in FIG. 5 or the outer ring 46 rotates in the counterclockwise direction (counter C direction) in FIG. 5, each roller 44 rotates counterclockwise in FIG. It moves in the direction of the deep groove while rotating. The gap between the inner peripheral surface of the deep groove portion and the outer peripheral surface of the pivot 16 is larger than the outer diameter of each roller 44 and is maintained at that position by the leaf spring 52, so that each roller 44 continues to rotate. At this time, torque is not transmitted between the outer ring 46 and the pivot 16, and the one-way wheel 38 is in a free state that allows relative rotation between the pivot 16 and the outer ring 46.

  As shown in FIG. 2, a plurality of one-way wheels 38 or plastic wheels 42 are accommodated in both barrels 20, and further, washers 54 are fitted to both ends of the pivot, and the center hole of the washer is fitted to the deformed end 56 of the pivot 16. After fitting, hit the pivot end to stop it. The diameter of the disk-shaped washer 54 is slightly larger than the inner diameter of the barrel 20 and is substantially equal to the inner diameter of the circumferential groove at the barrel end. The washer 54 can be fixed to a snap ring such as an E ring by groove formation, welding or screwing.

  The link bracket 14 used in the present invention is a substantially U-shaped plane as shown in FIG. 2, and has a laterally long side shape as shown in FIGS. In the bracket 14, parallel sleeves 22, 22 are formed at right angles to the bracket body 23 so as to be close to both sides thereof, and through holes 24, 24 through which the pivots 16, 18 pass are provided in each sleeve. The distance between the centers of the parallel sleeves 22 and 22 is determined to be a distance that can always maintain a close state when the first and second hinge portions 10 and 12 pivot with respect to each other.

  In the bracket body 23, the front and rear walls thereof are composed of an upper vertical wall 58 and a lower quarter-circumferential wall 60, and the lower wall 62 needs to be flat and horizontal. The quarter-circumferential walls 60 and 60 are essential for enabling the link bracket 14 to pivot about the pivot 16 or 18. For example, one of the vertical walls 58, 58 comes into contact with the surface of the rear protrusion 30 of the first hinge 10, so that the first hinge rests in a half-open position (see FIG. 10 (2)), and the other The first hinge unit 10 is stopped at the fully open position (see FIG. 10 (3)) by contacting the surface of the rear protrusion 30 of the second hinge unit 12. Therefore, the vertical distance from the vertical wall 58 to the center of the pivot 16 needs to be equal to the vertical distance from the surface of the rear protrusion 30 to the center of the pivot 16. Further, the lower wall 62 comes into contact with the surface of the rear projecting portion 30 of the second hinge portion 12 so that when the movable top plate 5 is closed from the fully opened position as shown in FIG. Or when referring to FIG. 11, it is necessary to make the first hinge part 10 stationary in the fully closed position.

  In the link bracket 14, the through holes 24 of both sleeves 22 have a cylindrical shape in which a key groove 64 is formed in the axial direction on the circular inner peripheral surface, and a chamfered portion (not shown) is formed at the front peripheral end of the through hole. . The plastic braking cylinder 66 shown in FIG. 9 includes a flange portion 68 and a cylindrical portion 70. The outer diameter of the cylindrical portion is substantially equal to the inner diameter of the through hole 24, and the inner diameter of the cylindrical portion is pivoted in a non-pressed state. Is slightly smaller than the diameter. Since the brake cylinder 66 is made of, for example, wear-resistant polyacetal, it can be used for a long time. When the brake cylinder 66 is housed in the through hole 24 from the front of the sleeve 22 (that is, rearward in FIG. 7), the key protrusion 72 provided in the axial direction engages with the key groove 64 of the through hole 24 and stops. In addition, when the lower corner portion 73 of the flange portion 68 is in close contact with the chamfered portion of the through hole 24, the brake cylinder 66 is completely fitted into the through hole 24 except for the flange portion 68.

  The length of the cylindrical portion 70 of the brake cylinder 66 may be the same as or shorter than the distance of the through hole 24. Instead of the brake cylinder 66, one cylinder and one washer can be used. When the brake cylinders 66 are respectively housed in the through holes 24, the flange portions 68 are interposed between the link bracket 14 and the barrels 20 of the hinge portions 10 and 12 (see FIG. 2), and the link bracket 14 and the hinge portions 10 and The frictional resistance at the time of mutual rotation with 12 is reduced.

  When the brake cylinder 66 is stationaryly accommodated in the through hole 24 of the sleeve 22 and the pivot 16 or 18 is press-fitted through the brake cylinder 66, the pivot can be supported so as to be capable of braking rotation. The brake cylinder 66 includes a key protrusion 72 provided in the axial direction on the outer peripheral wall of the brake cylinder so as not to idle together with the pivot 16 or 18. Such a detent may be a plurality of grooves in the peripheral wall formed in the one-way wheel 38, or the outer peripheral surface thereof may be a non-circular plane such as an ellipse or a rectangle, or may be integrated with an adhesive. The stopping method is the same for the one-way wheel 38.

  The hinge portions 10 and 12 are attached to the movable main body 5 and the fixed main body 7, respectively, and both rotate freely in one rotation direction, and are opposed to each other in a symmetrical shape, so that they freely rotate in the opposite direction (see FIG. 10). In this case, the free rotation means that it can be freely rotated as in the prior art without being braked. 10 and 11, the F direction and B direction on the left side of the figure mean the rotation direction of the first hinge part 10, that is, the movable top plate 5 with respect to the link bracket 14, and This means the direction of rotation of the link bracket 14 with respect to the second hinge portion 12, that is, the fixed top plate 7.

  The hinge mechanism 1 according to the present invention is attached to a movable top plate 5 and a fixed top plate 7 of a relatively large flip-up counter 3 as shown in FIG. 3 in a convenience store, a commercial dining kitchen, a snack bar, or the like. Is a general use, but is not limited to such use. For example, if the load capacity and dimensions of the hinge are changed, the present invention can be applied to a cover of an underground storage or a cover of a manhole.

  Next, the present invention will be described based on examples, but the present invention is not limited to the examples. The hinge mechanism 1 shown in FIG. 1 is attached in a pair to the left and right edges of a flip-up counter 3 (FIG. 3) in a long counter, and the movable top 5 is fixed to the fixed top 7 in the flip-up counter. It can be rotated so that it can be fully opened at about 180 degrees (see FIG. 10 (3)). In FIG. 3, the upper side 35 adjacent to the top plates 5, 7 may be cut so as to be chamfered in a circular arc when the counter 3 is made of wood.

  In FIG. 3, when the hinge mechanism 1 is housed in the recesses 31 and 33, the upper surfaces of the hinge portions 10 and 12 and the link bracket 14 coincide with the surfaces of the top plates 5 and 7. The widths of the recesses 31 and 33 include a thick width portion that matches the thickness of the barrel 20 and the bracket 14 of the hinge portions 10 and 12 and a thin width portion that matches the thickness of the lateral extension portion 26. When housed in 31, 33, the surfaces of the hinge portions 10, 12 coincide with the side wall surfaces of the top plates 5, 7. In this thin width portion, the laterally extending portions 26 of the hinge portions 10 and 12 are in contact with the inner walls of the recesses 31 and 33, so that they can be bolted to the top plates 5 and 7 at the locations of the laterally extending portions 26.

  In the thick width portions of the recesses 31 and 33, the width is substantially equal to the total width of the barrel 20 of the hinge portions 10 and 12 and the thickness of the bracket 14, and the sleeve 22 portion of the bracket is on the inner wall of the recesses 31 and 33. Fit into the drilled blind hole (not shown). On the other hand, if the width of the thick width portion is larger than the total width of the barrel 20 of the hinge portions 10 and 12 and the overall length of the bracket 14, a metal plate (not shown) having a curved upper side 35 is used as a top plate. They may be fixed to the surfaces 5 and 7 and shielded by positioning the sleeve 22 of the bracket below the plate. The surface of the metal plate is matched with the surfaces of the top plates 5 and 7.

  When assembling the hinge mechanism 1, the plastic brake cylinder 66 is fitted from the front into the through hole 24 of the sleeve 22 of the bracket 14, and the pivot 16 is moved after the first hinge portion 10 is positioned in front of the bracket 14. The brake cylinder 66 is press-fitted and passed. Since the pivot 16 protrudes into the barrel 20, a desired number of one-way wheels 38 are inserted into the pivot ends of the barrel 16, and washers 54 are fitted to both ends of the pivot to crimp the washers to the pivot ends. Next, the second hinge portion 12 and the pivot 18 may be assembled in the same manner as described above.

  In the hinge mechanism 1, when the outer ring 46 of the one-way wheel 38 rotates in the C direction of FIG. 5, that is, in the clockwise direction by turning the first hinge unit 10, the small roller 44 in each recess 48 also rotates in the clockwise direction. When the roller moves away from the narrow inner wall surface against the elasticity of the leaf spring 52, the outer ring 46 is idled around the pivot 16, and the movable top plate 5 can be easily opened upward by free rotation. Further, when turning downward to close the movable top plate 5, the outer ring 46 rotates counterclockwise in FIG. 5, and the small roller 44 in each recess 48 also rotates counterclockwise. As a result, each small roller 44 bites into the narrow inner wall surface of the recess 48 by the elastic force of the elastic leaf spring 52, rotates the pivot 16 together with the outer ring 46, and suppresses the pivot by the brake cylinder 66. It is possible to brake the sudden downward turning of the plate 5 and quietly close the movable top plate.

  With respect to the hinge mechanism 1, the full opening / closing operation of the movable top 5 will be described with reference to FIG. 10, the movable top plate 5, that is, the first hinge portion 10 rotates freely in the clockwise F direction as shown on the left side of FIG. 10 and brakes in the counterclockwise B direction with respect to the link bracket 14. Rotate. On the other hand, the link bracket 14 rotates freely in the counterclockwise F direction as shown on the right side of the fixed top plate 7, that is, the second hinge portion 12, and brakes and rotates in the clockwise B direction. To do.

  In FIG. 10 (1), the 1st hinge part 10, ie, the movable top plate 5, exists in a fully closed position. When the movable top 5 is opened as shown in FIG. 10 (1) to FIG. 10 (2), the movable top is freely rotated to the half-open position, that is, the 90-degree open position. Can be opened. Even when the movable top plate 5 is released during this free rotation, the movable top plate stops at that position. When the half-open position shown in FIG. 10 (2) is reached, the surface of the rear protrusion 30 of the first hinge part 10 comes into contact with the left vertical wall 58 of the link bracket 14, and the hinge part 10 rotates together with the movable top plate 5. Stops and the movable top plate stops at the half-open position.

  When the movable top plate 5 is further opened until FIG. 10 (3), the link bracket 14 is braked and rotated in the clockwise B direction of FIG. For this reason, even if the movable top plate 5 is released from the position shown in FIGS. 10 (2) to 10 (3) or suddenly pushed toward the fixed top plate 7, the movable top plate rotates gently. As a result, there are no finger stuffing accidents. When the movable top plate 5 turns 180 degrees and reaches the fully open position in FIG. 10 (3), the right vertical wall 58 of the link bracket 14 comes into contact with the surface of the rearward projecting portion 30 of the second hinge portion 12. The plate 5 stops.

  On the other hand, when the movable top plate 5 is closed from the fully open position of FIG. 10 (3) to the fully closed position of FIG. 10 (1), it passes through FIG. 10 (3) to the half open position of FIG. 10 (2). The link bracket 14 can freely rotate in the counterclockwise F direction in FIG. 10 with respect to the hinge portion 12 to lightly open the movable top plate. Even when the movable top plate 5 is released during this free rotation, the movable top plate stops at that position. When the half-open position shown in FIG. 10 (2) is reached, the lower wall 62 of the link bracket 14 comes into contact with the surface of the rear protruding portion 30 of the hinge portion 12, and the first hinge portion 10, that is, the movable top plate 5 is rotated. The movable top plate stops and stops at an upright position.

  When the movable top plate 5 is continuously closed to the position of FIG. 10 (1) through FIG. 10 (2), the link bracket 14 remains stationary and the hinge portion 10 rotates counterclockwise in FIG. 10 with respect to the link bracket 14. The brake rotates in the B direction. For this reason, even if the hand is released from the position of FIG. 10 (2) to FIG. 10 (1) or the movable top 5 is suddenly pushed toward the fixed top 7, the movable top 5 rotates gently. As a result, there are no finger stuffing accidents. When the movable top 5 turns 180 degrees and reaches the fully closed position in FIG. 10 (1), the movable top 5 stops.

  The hinge mechanism 74 shown in FIG. 11 has a configuration in which braking rotation and free rotation of the first and second hinge portions 76 and 78 are opposite to those of the hinge portions 10 and 12 of the first embodiment. With regard to the hinge mechanism 74, the full opening / closing operation of the movable top plate 5 will be described with reference to FIGS. In FIG. 11, the movable top plate 5, that is, the hinge portion 76 rotates freely in the counterclockwise F direction with respect to the link bracket 14 and brakes and rotates in the clockwise B direction. On the other hand, the link bracket 14 rotates freely in the clockwise F direction with respect to the hinge portion 78 and brakes and rotates in the B direction counterclockwise.

  When the movable top plate 5 is opened from the fully closed position as shown in FIG. 11, the first hinge portion 76 rotates together with the link bracket 14 in the clockwise F direction with respect to the second hinge portion 78, It freely rotates to the half-open position shown in FIG. Even when the movable top plate 5 is released during this free rotation, the movable top plate stops at that position. When the half-open position shown in FIG. 11 is reached, the right vertical wall 58 of the link bracket 14 comes into contact with the surface of the rear protrusion 30 of the hinge portion 78, and the link bracket 14 and the first hinge portion 76 are stationary at the half-open position. .

  When the movable top plate 5 is further opened to FIG. 10 (3), the link bracket 14 remains stationary and the first hinge portion 76 is braked and rotated in the clockwise B direction of FIG. . For this reason, even if the hand is released at the position up to FIG. 10 (3), the movable top 5 is gently rotated downward. When the movable top plate 5 turns 180 degrees and reaches the fully open position shown in FIG. 10 (3), the surface of the rear protrusion 30 of the first hinge portion 76 comes into contact with the left vertical wall 58 of the link bracket 14. The movable top stops.

  On the other hand, when the movable top 5 is closed from the fully opened position in FIG. 10 (3), the first hinge 76 is in the counterclockwise F direction in FIG. The movable top plate can be lightly opened. When the half-open position shown in FIG. 11 is reached, the surface of the rear protrusion 30 of the first hinge portion 76 comes into contact with the lower wall 62 of the link bracket 14, and the rotation of the first hinge portion 76 is relative to the link bracket 14. The movable top 5 stops and stops at the half-open position.

  When the movable top plate 5 is continuously closed to the position shown in FIG. 10 (1) through FIG. 11, the link bracket 14 is braked and rotated in the counterclockwise B direction of FIG. The 1 hinge part 76 turns together with the link bracket 14. For this reason, since the movable top plate 5 rotates gently, a finger jamming accident does not occur. When the movable top plate 5 turns 180 degrees and reaches the fully closed position of FIG. 10A, the lower wall 62 of the link bracket 14 comes into contact with the surface of the rearward projecting portion 30 of the hinge portion 78, and the link bracket 14 and the 1 hinge part 76 stops.

  The hinge mechanism 74 is functionally the same as the hinge mechanism 1 of the first embodiment. However, when the movable top plate 5 is opened 90 degrees, the movable top plate of the same length is opened due to a different stationary position. The width is slightly larger. For this reason, in the case of a relatively short movable top plate, the hinge mechanism 74 is more convenient than the hinge mechanism 1.

DESCRIPTION OF SYMBOLS 1 Hinge mechanism 3 Bounce counter 5 Movable top plate 7 Fixed top plate 10 1st hinge part 12 2nd hinge part 14 Link bracket 16,18 Pivot 20 Hinge part barrel 22, 22 Parallel sleeve 24 Sleeve through-hole 38 One-way ring 42 Plastic wheel 66 Plastic brake cylinder

Claims (6)

  A first hinge portion attached to the movable main body; a second hinge portion attached to the fixed main body and having a shape symmetrical to the first hinge portion; and a link bracket pivotably coupled to the first and second hinge portions. The parallel pivots penetrate the barrel part of the hinge part and the sleeve through hole of the bracket, respectively, so that the whole is integrated, and one-way wheels are stationaryly stored in both barrels of the link part. A hinge mechanism that supports each pivot so that it can rotate in one direction, while holding a plastic brake cylinder stationary in the sleeve through-hole of the bracket and press-fitting each pivot into the brake cylinder so that it can rotate and rotate. By attaching the first hinge part to the movable body and attaching the second hinge part to the fixed body, the movable body can be swung from the fully closed state. Then, one of the hinge parts rotates freely, and when it is half open, the first link part is stationary by one side of the link bracket, and when the movable body continues to turn, the second link part brakes and rotates to full release. Hinge mechanism.   The first and second hinge portions are each formed with a horizontally projecting rear projecting portion, and the surface of the rear projecting portion abuts against the side of the link bracket in a half-open or fully-open position. Hinge mechanism.   The link bracket has a laterally long side shape, and the plastic brake cylinder or one-way wheel is stationaryly stored in the through holes of the sleeves formed close to both sides of the bracket, and the left side of the link bracket in the half open state of the movable body The hinge mechanism according to claim 1, wherein the side is in contact with the surface of the rearward protruding portion of the first hinge portion, or the right side thereof is in contact with the surface of the rearward protruding portion of the second hinge portion.   The plastic brake cylinder is composed of a cylindrical body that is accommodated in the sleeve through-hole of the link bracket or in the barrels of the first and second hinge parts, and is stationary in the through-hole by the intervention of the axial protrusion in the cylindrical body. The hinge mechanism according to claim 1, wherein the press-fitted pivot is effectively braked.   The one-way wheel is stored stationary in the barrels of the first and second hinge portions or in the sleeve through-holes of the link bracket, and the load resistance of the hinge mechanism can be adjusted by increasing or decreasing the number of storage in the barrel. 2. The hinge mechanism according to claim 1, wherein a plastic ring having substantially the same shape as the one-way wheel is disposed in a space generated by reducing the number of stored rings.   The two hinge mechanisms are respectively attached to the left and right edges of the top plate of the flip-up counter, and chamfered above the adjacent sides of the movable and fixed top plates so that the movable top plate can be swung close to the fixed top plate. The hinge mechanism according to 1.

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